The following is an excerpt.
A biological computer – the most advanced one ever developed – has been created by researchers from the Technion-Israel Institute of Technology in Haifa. This biological transducer is created using only biomolecules including DNA and enzymes. The device is able to read genetic code, carry out calculations and manipulate DNA to report its results.
The biomolecular computer could be used to detect DNA sequences, as well as to process and manipulate genetic code. Researchers believe that a sufficiently-advanced biological computer could have the computational power of a universal Turing machine, able to simulate other computers.
Read the full story here: Biological computer uses DNA in calculations